Bug can you please please go and learn how steel is made and then find out how composites are made and finally aluminium, then you might get an understanding of what coking coal is hopefully…
even good old ally uses it
http://www.madehow.com/Volume-5/Aluminum.html
“The other major ingredient used in the smelting operation is carbon. Carbon electrodes transmit the electric current through the electrolyte. During the smelting operation, some of the carbon is consumed as it combines with oxygen to form carbon dioxide. In fact, about half a pound (0.2 kg) of carbon is used for every pound (2.2 kg) of aluminum produced. Some of the carbon used in aluminum smelting is a byproduct of oil refining; additional carbon is obtained from coal”
If there are NO coal fired powerplants on the planet we will still be mining coal…do you get it?
Wood could well be the only carbon neutral resource to build something with, subject to to the glues used?
Growing, felling, replanting absorbs carbon